This is the Chinese maintenance manual for LT2657 LCD TV. It mainly introduces the product's safety precautions, basic specifications, operation instructions and adjustments, connection introduction, fault handling process, disassembly process diagram, white balance adjustment, BOM, PCB Layout, circuit diagram, TV electrical block diagram and TV explosion diagram.
This service manual is intended for technicians repairing the Changhong LT2657 26‑inch LCD television. It includes safety and handling precautions, detailed product specifications, operation and adjustment procedures, connection options, fault‑handling flowcharts, disassembly diagrams, white‑balance adjustment, a bill of materials, PCB layouts, circuit diagrams, and exploded views.
The document also lists the TV’s key technical data such as screen size, resolution, brightness, contrast ratio, viewing angles, power consumption, dimensions and weight, helping technicians verify the correct configuration and perform accurate diagnostics and repairs. This manual is written in Chinese.
| Screen size | 26" |
|---|---|
| Resolution | WXGA (1366×768) |
| Brightness | 500 cd/m² |
| Contrast ratio | 600:1 |
| Viewing angle | Horizontal 160°, Vertical 150° |
| Response time | 8 ms (typ) |
| Lamp life | 50 000 hours |
| Power consumption | <150 W |
| Net weight (no accessories) | 11 kg |
| Dimensions (with stand) | 674.9 × 532.1 × 211.3 mm |
The manual provides a dedicated white‑balance adjustment procedure in the “White Balance Adjustment” section.
Store the TV between –10 °C and +50 °C, avoiding direct sunlight and high humidity.